I'm from Spark, and I can try to answer! :)
With more than 20,000 units in the field, the Spark community is the largest consumer of the CC3000 module, so you get the benefits of driver testing and patches, and great community support. Large businesses could certainly use the open source modules and run with them, but if you're a large business you generally want to pay for support and licensing. Next for us is building a suite of fleet management tools and controls that larger companies want that also benefit hobbyists.If you're a business or a maker, using the Spark Cloud saves you from having to worry about building your own protocol, dealing with socket programming, spinning up servers, as well as worrying about encryption on microcontrollers, or wearing a pager. Having the source code available means you can keep your private things private by not going over the internet, as well as building things we haven't thought of yet.
Thanks!
David